I was sitting in yet another climate conference last month—you know the kind, where everyone’s got their reusable water bottles and tote bags, but half the speakers have just flown in from across the continent—when something clicked for me during a breakout session on systemic change. The moderator asked a deceptively simple question: “What single policy change could significantly reduce emissions while actually improving people’s lives?” The usual suspects came up—carbon taxes, renewable subsidies, public transport investments. All good stuff, mind you. But then someone mentioned four-day workweeks, and I nearly spilled my (locally-sourced, obviously) coffee all over my lap.
It wasn’t that I hadn’t heard of four-day workweeks before. They’ve been floating around progressive policy circles for ages, usually framed as a work-life balance issue or mental health intervention. But I’d never seriously considered their environmental implications. Which is mad, really, when you think about it for more than thirty seconds.
That night I couldn’t sleep (partly because the eco-hostel I’d booked had mattresses stuffed with something that felt suspiciously like recycled cardboard—sustainable but bloody uncomfortable). My brain kept running calculations. One less commuting day for millions of workers. Offices running at 80% of their usual schedule. Less workplace consumption. More time for people to actually do all those sustainable practices that we environmental types are always harping on about—growing food, cooking from scratch, repairing things instead of replacing them, taking slower but greener transportation options.
The next morning, I skipped the conference breakfast (sorry not sorry—those networking breakfasts are my personal nightmare) and spent three hours in a nearby café with terrible wifi but excellent sourdough toast, pulling together every scrap of research I could find on four-day workweeks and environmental impact. And let me tell you, the data was startling.
Let’s start with the bloody obvious: commuting. In the UK alone, we make roughly 15 million car commuting trips daily. Cut 20% of those out and you’re looking at massive emissions reductions. When Microsoft Japan tried a four-day week, they saw a 23% reduction in electricity usage. During the pandemic lockdowns, we saw what dramatically reduced commuting did for air quality and carbon emissions—cities where you could suddenly see the skyline, wildlife returning to urban areas, carbon emissions dropping so significantly they were visible from satellite imagery. Obviously we don’t want another pandemic (though my sourdough game did improve dramatically), but the four-day week offers a way to permanently lock in some of those environmental gains without the accompanying existential dread.
But it’s not just about direct energy and transport emissions. There’s something deeper and more structural at play that gets me properly excited as an environmentalist.
Our entire economic system is built on a weird paradox that nobody likes to talk about: we work long hours to earn money to buy convenience products that we only need because we’re working such long hours. It’s utterly bonkers when you step back and look at it. I’m thinking of my friend Mei, who works at a consulting firm in London. She commutes 90 minutes each way, so she’s too exhausted to cook when she gets home. She orders takeaway that comes in single-use packaging, because she doesn’t have time to go to the shops with her reusable containers. She pays for a cleaner because she doesn’t have time to clean her own flat. She buys new clothes instead of mending old ones because who has time for that? She’s caught in this loop where time poverty drives consumption, which drives environmental degradation.
When I mentioned this to her, she just laughed and said, “Eliza, I’d love to live like you with your homemade everything and carefully sorted recycling, but some of us have to work for a living.” Which…fair enough, I suppose. My job writing about sustainability does give me more flexibility than many. But that’s exactly my point—it shouldn’t be a luxury to have enough time to live sustainably.
The data backs this up, though it’s spread across different research areas that don’t always talk to each other. Studies show that long working hours correlate with energy-intensive diets, increased use of convenience products, more driving rather than walking or cycling (because it’s faster), and generally higher-carbon lifestyles. It makes perfect sense when you think about it. If you’re time-poor but cash-rich, you outsource and you opt for convenience, both of which tend to have higher environmental footprints.
The really fascinating bit is what happens when people do get an extra day off. Some research from Iceland’s trials of shorter work weeks found that people didn’t just collapse on the sofa watching Netflix (though let’s be honest, a bit of that happened too). They took up activities that are both low-carbon and high well-being: more time outdoors, more social connection, more creative hobbies, more home cooking, more engagement with their local community.
My colleague Jamie took part in a four-day week trial at his previous job and swears it changed his relationship with consumption. “I realized I’d been impulse shopping online during my lunch breaks as a way to break up the workday,” he told me over yet another conference lunch (these events are 90% eating, I swear). “When I had three-day weekends, I found myself actually fixing things around the house that had been broken for ages, going to the repair café with my busted headphones instead of just Prime-ing new ones, actually using stuff I already owned.” He reckons he spent about 30% less money during the trial, mostly on things that would have ended up as waste.
Of course, it’s not quite as simple as “fewer work days equals saved planet.” There are legitimate concerns and complexities. What if people use their extra day off to drive to out-of-town shopping centers? What if they fly more for long weekends away? What about energy-intensive industries that might need to run additional shifts to maintain output? And how do we ensure that a four-day week doesn’t just become a privilege for office workers while shift workers and the service sector get left behind?
These are all valid questions that need proper research and policy consideration. But they’re questions of implementation, not fundamental flaws in the concept.
Some traditional economists will inevitably freak out about reduced productivity and economic growth. But honestly, that’s part of what makes this idea so radical and necessary. We desperately need to reimagine what “prosperity” looks like in a world with finite resources. The never-ending growth model is fundamentally incompatible with planetary boundaries—something I’ve been banging on about for years, usually to glazed expressions at family dinners. (Sorry, Uncle Pete, but infinite growth on a finite planet really is impossible, even if it messes with your investment portfolio.)
The beauty of the four-day week is that it sidesteps the usual growth vs. environment deadlock by offering tangible benefits to ordinary people. It’s not asking people to sacrifice for the planet—it’s offering them something incredibly desirable (more free time) that just happens to have environmental benefits. That’s the sweet spot for environmental policy, and it’s vanishingly rare.
I’m not suggesting a four-day workweek is some magical bullet that solves all our environmental problems. We still need renewable energy, sustainable agriculture, circular economy principles, and all the other structural changes I’ve written about for years. But time is a resource too—perhaps the most fundamental one—and how we structure it has profound implications for our environmental impact.
Later that same conference day (yes, still the same conference—these things go on forever), I ran the idea past Sophia, an environmental economist whose work I’ve admired for ages. She pointed out something I hadn’t considered: “The four-day week creates space for the maintenance activities that a sustainable society needs more of—the caring, the repairing, the growing, the sharing. These are all relatively low-carbon but time-intensive. Our current economy undervalues them because they’re not productive in GDP terms, but they’re essential for sustainability.”
I’ve been turning that over in my mind ever since. Maybe the time dividend from a shorter work week is exactly what we need to rebuild some of the low-carbon practices that got squeezed out by industrial capitalism—the community repair skills, the knowledge of how to grow and preserve food, the sharing of resources among neighbors, the intergenerational teaching of practical skills.
My grandma used to spend every Sunday evening darning socks and mending clothes, skills she tried to teach me before she passed. I was too busy with homework and, later, with work, to really learn properly. Now I find myself watching YouTube tutorials trying to figure out how to extend the life of my favorite jumper because fast fashion is an environmental nightmare. But these maintenance activities take time—time our current work structure doesn’t easily allow for.
So yeah, I’m firmly on the four-day workweek bandwagon now, and not just because I fancy having more time for my container garden (though I absolutely do). I believe it could be one of those rare policy innovations that aligns environmental necessity with human well-being in a way that actually feels possible.
The next time someone tells you that environmental protection is all about sacrifice and giving things up, remind them about this. A four-day workweek would reduce emissions AND give people something they desperately want—their time back. If that’s not a win-win, I don’t know what is.
Now I just need to convince my editor that researching this article totally justifies me moving to a four-day schedule myself. Wish me luck with that one—pretty sure I can already hear the eye-rolling from here.
